Being an undergraduate chemistry student I have to write a significant amount of hand-ins e.g. lab reports. Up until now I've been using LaTex with
mhchem for equations and
siunitx for numbers/units, but I've not invested the time and effort in learning other, more complicated chemistry related packages. This means, that I usually draw mechanisms with ChemDraw and other figures with image editors.
So my question is: which packages is it worth spending the time on learning (and using)?